java.lang.NumberFormatException: For input string: "" at java.lang.NumberFormatException.forInputString(Unknown Source) at java.lang.Integer.parseInt(Unknown Source) at java.lang.Integer.parseInt(Unknown Source) at jenkins.model.PeepholePermalink.resolve(PeepholePermalink.java:87) at hudson.model.Job.getLastUnsuccessfulBuild(Job.java:862)